Looking for firmware

[Sickness.inside]

Hello,

I have an MP4 player which gets stuck while at the first loading screen. At first it was undetectable by the computer,but I got it working in Restoration mode. I suspect a virus being the cause of this problem because it happened after I plugged it in a friend's computer.
What I'm asking for is this, is there a way to repair my player without updating the firmware ? Otherwise, I disassembled my player, and got the following information:
Chip : AK1025
Board : QY 781fv2
LCD : PY 1315w 1
If anyone finds a possible working firmware, I'm willing to give it a try.
Also, if it is of any help, I found somewhere that my board has the same firmware as the following boards:
QY-030FV2
QY-042FV2
QY-960FV2
QY-693FV2
QY-781FV2
QY-052FV2
QY-751V1
QY-050
QY-793FV2
QY-141FV2
QY-145FV1
QY-693FV1

Thanks in advance.

Edit: Another symptom, If I leave my mp4 player on, it stays on, I mean until the battery goes off, which wasn't the case earlier.
And as an update, I desperately tried a updating with a firmware, which failed, and now the layer is no longer in ADFU state, I can see it as if it's working properly, but can't access it in My Computer.